Comment by ThrowawayB7
11 hours ago
Having STEs as full time employees benefited MS greatly. They knew products from the end user and UI/UX perspective inside and out in ways even the SDETs didn't.
UI/UX quality in MS products dipped noticeably after the STE role was eliminated.
Imho, there are two key values that I've seen QA bring to software companies.
1. Deep user/product expertise. QA (and support) almost always knows more about how users (including expert users) actually use the product than dev.
2. Isolation of quality from dev leadership politics. It should be unsurprising that asking an org to measure and report the quality of its own work is fraught with peril. Even assuming good intentions, having the same person who has been developing and staring at a feature for months test it risks incomplete testing: devs have no way to forget all the insider things they know about a feature.